WO2002061363A3 - 2-d projectile trajectory corrector - Google Patents

2-d projectile trajectory corrector Download PDF

Info

Publication number
WO2002061363A3
WO2002061363A3 PCT/US2002/002553 US0202553W WO02061363A3 WO 2002061363 A3 WO2002061363 A3 WO 2002061363A3 US 0202553 W US0202553 W US 0202553W WO 02061363 A3 WO02061363 A3 WO 02061363A3
Authority
WO
WIPO (PCT)
Prior art keywords
projectile trajectory
projectile
trajectory corrector
correction
trajectory
Prior art date
Application number
PCT/US2002/002553
Other languages
French (fr)
Other versions
WO2002061363A2 (en
Inventor
John G Rupert
Jeff Siewart
Original Assignee
United Defense Lp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by United Defense Lp filed Critical United Defense Lp
Priority to DE60233113T priority Critical patent/DE60233113D1/en
Priority to AU2002245348A priority patent/AU2002245348A1/en
Priority to AT02713500T priority patent/ATE438074T1/en
Priority to EP02713500A priority patent/EP1366339B1/en
Publication of WO2002061363A2 publication Critical patent/WO2002061363A2/en
Publication of WO2002061363A3 publication Critical patent/WO2002061363A3/en

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
    • F42B12/00—Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material
    • F42B12/02—Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material characterised by the warhead or the intended effect
    • F42B12/36—Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material characterised by the warhead or the intended effect for dispensing materials; for producing chemical or physical reaction; for signalling ; for transmitting information
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
    • F42B10/00—Means for influencing, e.g. improving, the aerodynamic properties of projectiles or missiles; Arrangements on projectiles or missiles for stabilising, steering, range-reducing, range-increasing or fall-retarding
    • F42B10/32—Range-reducing or range-increasing arrangements; Fall-retarding means
    • F42B10/48—Range-reducing, destabilising or braking arrangements, e.g. impact-braking arrangements; Fall-retarding means, e.g. balloons, rockets for braking or fall-retarding
    • F42B10/50—Brake flaps, e.g. inflatable
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
    • F42B10/00—Means for influencing, e.g. improving, the aerodynamic properties of projectiles or missiles; Arrangements on projectiles or missiles for stabilising, steering, range-reducing, range-increasing or fall-retarding
    • F42B10/32—Range-reducing or range-increasing arrangements; Fall-retarding means
    • F42B10/48—Range-reducing, destabilising or braking arrangements, e.g. impact-braking arrangements; Fall-retarding means, e.g. balloons, rockets for braking or fall-retarding
    • F42B10/54—Spin braking means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
    • F42B10/00—Means for influencing, e.g. improving, the aerodynamic properties of projectiles or missiles; Arrangements on projectiles or missiles for stabilising, steering, range-reducing, range-increasing or fall-retarding
    • F42B10/60—Steering arrangements
    • F42B10/62—Steering by movement of flight surfaces
    • F42B10/64—Steering by movement of flight surfaces of fins

Abstract

A device and method of adjusting a trajectory of a projectile (20) in flight including increasing projectile (20) drag to effect a downrange correction and altering the yaw of repose to effect a cross range correction. A method of a vernier correction to the trajectory is included.
PCT/US2002/002553 2001-02-01 2002-01-29 2-d projectile trajectory corrector WO2002061363A2 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
DE60233113T DE60233113D1 (en) 2001-02-01 2002-01-29 TWO-DIMENSIONAL STORE FLIGHT GATE CORRECTION DEVICE
AU2002245348A AU2002245348A1 (en) 2001-02-01 2002-01-29 2-d projectile trajectory corrector
AT02713500T ATE438074T1 (en) 2001-02-01 2002-01-29 TWO-DIMENSIONAL PROJECTIVE TRAVEL CORRECTION DEVICE
EP02713500A EP1366339B1 (en) 2001-02-01 2002-01-29 2-d projectile trajectory corrector

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US26572501P 2001-02-01 2001-02-01
US26579401P 2001-02-01 2001-02-01
US60/265,725 2001-02-01
US60/265,794 2001-02-01

Publications (2)

Publication Number Publication Date
WO2002061363A2 WO2002061363A2 (en) 2002-08-08
WO2002061363A3 true WO2002061363A3 (en) 2003-03-13

Family

ID=26951391

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2002/002553 WO2002061363A2 (en) 2001-02-01 2002-01-29 2-d projectile trajectory corrector

Country Status (6)

Country Link
US (2) US6502786B2 (en)
EP (1) EP1366339B1 (en)
AT (1) ATE438074T1 (en)
AU (1) AU2002245348A1 (en)
DE (1) DE60233113D1 (en)
WO (1) WO2002061363A2 (en)

Families Citing this family (68)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10130383A1 (en) * 2001-06-23 2003-01-09 Diehl Munitionssysteme Gmbh Artillery projectile with interchangeable payload
US20040041059A1 (en) * 2002-09-03 2004-03-04 Kennedy Kevin D. Device for projectile control
FR2845763B1 (en) * 2002-10-11 2006-12-01 Tda Armements Sas AUTONOMOUS GUIDING SYSTEM FOR ARTILLERY MUNITION AND GUIDED ARTILLERY MUNITION
US6745978B1 (en) * 2003-03-24 2004-06-08 At&T Corp. Aerodynamic stabilization of a projectile
US6869043B1 (en) * 2003-03-24 2005-03-22 At&T Corp. Deployable flare with simplified design
US6783095B1 (en) * 2003-03-24 2004-08-31 At&T Corp. Deployable flare for aerodynamically stabilizing a projectile
US20090120653A1 (en) * 2003-07-31 2009-05-14 Michael Steven Thomas Fire suppression delivery system
US6981672B2 (en) * 2003-09-17 2006-01-03 Aleiant Techsystems Inc. Fixed canard 2-D guidance of artillery projectiles
US7163176B1 (en) 2004-01-15 2007-01-16 Raytheon Company 2-D projectile trajectory correction system and method
DE102005039902A1 (en) * 2005-02-04 2006-08-10 Rheinmetall Waffe Munition Gmbh Device for increasing the precision of tail-wing stabilized ammunition
US7533849B2 (en) * 2005-02-07 2009-05-19 Bae Systems Information And Electronic Systems Integration Inc. Optically guided munition
US7698983B1 (en) * 2005-11-04 2010-04-20 The United States Of America As Represented By The Secretary Of The Army Reconfigurable fire control apparatus and method
US7566027B1 (en) 2006-01-30 2009-07-28 Alliant Techsystems Inc. Roll orientation using turns-counting fuze
US7611095B1 (en) * 2006-04-28 2009-11-03 The Boeing Company Aerodynamic re-entry vehicle control with active and passive yaw flaps
US7800032B1 (en) * 2006-11-30 2010-09-21 Raytheon Company Detachable aerodynamic missile stabilizing system
US7963442B2 (en) * 2006-12-14 2011-06-21 Simmonds Precision Products, Inc. Spin stabilized projectile trajectory control
US7849800B2 (en) 2007-06-24 2010-12-14 Raytheon Company Hybrid spin/fin stabilized projectile
US8338769B1 (en) * 2008-02-07 2012-12-25 Simmonds Precision Products, Inc. Pyrotechnic fin deployment and retention mechanism
US8124921B2 (en) * 2008-04-25 2012-02-28 Raytheon Company Methods and apparatus for guidance of ordnance delivery device
US8049149B2 (en) * 2008-05-16 2011-11-01 Raytheon Company Methods and apparatus for air brake retention and deployment
US8513581B2 (en) * 2008-05-20 2013-08-20 Raytheon Company Multi-caliber fuze kit and methods for same
US8193476B2 (en) * 2008-06-13 2012-06-05 Raytheon Company Solid-fuel pellet thrust and control actuation system to maneuver a flight vehicle
EP2304383A4 (en) 2008-07-09 2014-01-01 Bae Sys Land & Armaments Lp Roll isolation bearing
US7986265B2 (en) 2008-08-29 2011-07-26 Interstate Electronics Corporation Systems and methods for determining a rotational position of an object
US9040885B2 (en) * 2008-11-12 2015-05-26 General Dynamics Ordnance And Tactical Systems, Inc. Trajectory modification of a spinning projectile
US7964830B2 (en) * 2009-02-23 2011-06-21 Raytheon Company Large cross-section interceptor vehicle and method
RU2556794C2 (en) * 2009-02-24 2015-07-20 Блу Ориджин, Ллк Orbital injection means with stationary and unfolding deceleration surfaces and/or shaped fuel tanks and appropriate systems and methods
US8878111B2 (en) * 2009-02-24 2014-11-04 Blue Origin, Llc Bidirectional control surfaces for use with high speed vehicles, and associated systems and methods
US8076623B2 (en) * 2009-03-17 2011-12-13 Raytheon Company Projectile control device
IL203642A (en) 2010-02-01 2014-01-30 Yesaiahu Redler Apparatus and method for optimizinmg current use during control of multiple motors and a projectile device containing the same
US8026465B1 (en) 2009-05-20 2011-09-27 The United States Of America As Represented By The Secretary Of The Navy Guided fuse with variable incidence panels
US8729442B2 (en) * 2009-06-15 2014-05-20 Blue Origin, Llc Predicting and correcting trajectories
WO2010148025A1 (en) 2009-06-15 2010-12-23 Blue Origin, Llc Compensating for wind prior to engaging airborne propulsion devices
RU2683211C2 (en) * 2009-06-15 2019-03-26 Блу Ориджин, Ллк Systems for accessing outer space (variants)
US8319164B2 (en) * 2009-10-26 2012-11-27 Nostromo, Llc Rolling projectile with extending and retracting canards
US9939238B1 (en) 2009-11-09 2018-04-10 Orbital Research Inc. Rotational control actuation system for guiding projectiles
JP4732546B1 (en) * 2010-11-22 2011-07-27 英世 村上 Flight equipment
US8916810B2 (en) * 2011-03-30 2014-12-23 Raytheon Company Steerable spin-stabilized projectile
US8816261B1 (en) * 2011-06-29 2014-08-26 Raytheon Company Bang-bang control using tangentially mounted surfaces
US9228815B2 (en) * 2011-07-04 2016-01-05 Omnitek Partners Llc Very low-power actuation devices
SE535991C2 (en) 2011-07-07 2013-03-19 Bae Systems Bofors Ab Rotationally stabilized controllable projectile and procedure therefore
US9086259B2 (en) 2011-08-26 2015-07-21 Bae Systems Information And Electronic Systems Integration Inc. Apparatus for deploying stowed control surfaces of a projectile
SE536255C2 (en) * 2012-02-06 2013-07-23 Bae Systems Bofors Ab Brake panel for a spark plug or projectile
JP5510979B1 (en) * 2013-02-15 2014-06-04 防衛省技術研究本部長 Resistance wing structure
US9487308B2 (en) * 2013-03-15 2016-11-08 Blue Origin, Llc Launch vehicles with ring-shaped external elements, and associated systems and methods
US20160187111A1 (en) * 2014-08-10 2016-06-30 Jahangir S Rastegar Methods and Devices For Guidance and Control of High-Spin Stabilized Rounds
US9702673B1 (en) * 2014-09-24 2017-07-11 The United States Of America As Represented By The Secretary Of The Army Projectile tail boom with self-locking fin
KR101628154B1 (en) * 2015-03-05 2016-06-08 국방과학연구소 Multiple target tracking method using received signal strengths
FR3035205B1 (en) * 2015-04-20 2018-10-05 Roxel France DEVICE FOR CORRECTING THE TRACK OF A PROJECTILE AND METHOD OF CORRECTING A TRACK
US9983315B1 (en) * 2015-05-29 2018-05-29 Interstate Electronics Corporation Satellite navigation receiver for a rapidly rotating object with improved resistance to jamming
FR3041744B1 (en) * 2015-09-29 2018-08-17 Nexter Munitions ARTILLERY PROJECTILE HAVING A PILOTED PHASE.
DE102015013913A1 (en) 2015-10-27 2017-04-27 Deutsch Französisches Forschungsinstitut Saint Louis Full-caliber, spin-stabilized steer bullet with a long range
US10508892B1 (en) 2016-08-15 2019-12-17 The United States Of America As Represented By The Secretary Of The Navy Distributed fuze architecture for highly reliable submunitions
US10822122B2 (en) 2016-12-28 2020-11-03 Blue Origin, Llc Vertical landing systems for space vehicles and associated methods
KR101903254B1 (en) * 2016-12-28 2018-10-01 주식회사 한화 Apparatus for controlling roll and pitch canard of precision guidance kit
US11555679B1 (en) 2017-07-07 2023-01-17 Northrop Grumman Systems Corporation Active spin control
US11578956B1 (en) 2017-11-01 2023-02-14 Northrop Grumman Systems Corporation Detecting body spin on a projectile
US11349201B1 (en) 2019-01-24 2022-05-31 Northrop Grumman Systems Corporation Compact antenna system for munition
US11560243B2 (en) 2019-02-22 2023-01-24 Blue Origin, Llc Spacecraft multifunction connecting mechanisms including interchangeable port opening docking mechanisms, and associated systems and methods
US11565628B2 (en) 2019-03-29 2023-01-31 Blue Origin, Llc Spacecraft with increased cargo capacities, and associated systems and methods
US11581632B1 (en) 2019-11-01 2023-02-14 Northrop Grumman Systems Corporation Flexline wrap antenna for projectile
CN111578793B (en) * 2020-05-07 2022-08-23 北京星途探索科技有限公司 Sideslip angle control method for rocket fairing separation in windy condition
US11573069B1 (en) 2020-07-02 2023-02-07 Northrop Grumman Systems Corporation Axial flux machine for use with projectiles
US11885601B1 (en) 2021-03-09 2024-01-30 United States Of America As Represented By The Secretary Of The Air Force Variable angle load transfer device
CN113091524B (en) * 2021-03-18 2022-08-30 中北大学 One-dimensional ballistic resistive patch continuous correction mechanism capable of being repeatedly unfolded and method
US11835319B2 (en) * 2021-06-07 2023-12-05 The Boeing Company Guided projectile and countermeasure systems and methods for use therewith
CN113720213B (en) * 2021-08-02 2022-10-14 北京理工大学 Stern for guided projectile and guided projectile
DE102022002226A1 (en) 2021-08-21 2023-06-15 Kastriot Merlaku Lighting system intended to illuminate a stadium

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5379968A (en) * 1993-12-29 1995-01-10 Raytheon Company Modular aerodynamic gyrodynamic intelligent controlled projectile and method of operating same
US5826821A (en) * 1997-08-04 1998-10-27 The United States Of America As Represented By The Secretary Of The Army Drag control module for range correction of a spin stabil
US6310335B1 (en) * 1998-11-30 2001-10-30 Giat Industries Translational braking device for a projectile during its trajectory

Family Cites Families (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1947884A1 (en) * 1969-09-22 1971-04-01 Rainer Schoeffl Tail unit especially for missiles
DE2650139C2 (en) * 1976-10-30 1982-04-22 Eltro GmbH, Gesellschaft für Strahlungstechnik, 6900 Heidelberg Method and device for correcting the trajectory of a projectile
SE8600380L (en) * 1986-01-29 1987-07-30 Bofors Ab DEVICE FOR REDUCING PROJECT DISTRIBUTION
DE3628129C1 (en) * 1986-08-19 1988-03-03 Rheinmetall Gmbh Missile
US5507452A (en) * 1994-08-24 1996-04-16 Loral Corp. Precision guidance system for aircraft launched bombs
US5657947A (en) * 1994-08-24 1997-08-19 Loral Corp. Precision guidance system for aircraft launched bombs
SE511986C2 (en) * 1995-10-06 2000-01-10 Bofors Ab Ways to correct the projectile trajectory for rotation stabilizing projectiles
US5886257A (en) * 1996-07-03 1999-03-23 The Charles Stark Draper Laboratory, Inc. Autonomous local vertical determination apparatus and methods for a ballistic body
US5775636A (en) * 1996-09-30 1998-07-07 The United States Of America As Represented By The Secretary Of The Army Guided artillery projectile and method
US5762291A (en) 1996-10-28 1998-06-09 The United States Of America As Represented By The Secretary Of The Army Drag control module for stabilized projectiles
US5816531A (en) * 1997-02-04 1998-10-06 The United States Of America As Represented By The Secretary Of The Army Range correction module for a spin stabilized projectile
FR2762080B1 (en) * 1997-04-15 1999-07-02 Tda Armements Sas MICRO-GOVERNOR DEVICE FOR CORRECTION OF ROTATION-STABILIZED AMMUNITION TRAJECTORY
DE19740888C2 (en) 1997-09-17 1999-09-02 Rheinmetall W & M Gmbh Method for autonomously steering a spin-stabilized artillery projectile and autonomously guided artillery projectile for carrying out the method
FR2768809B1 (en) 1997-09-24 1999-10-15 Giat Ind Sa LARGE CALIBER LONG RANGE FIELD ARTILLERY PROJECTILE
US6310325B1 (en) * 1998-02-18 2001-10-30 Colburn Treat, Llc. Steamer oven with controlled condensing of steam
FR2792400B1 (en) 1999-04-16 2002-05-03 Giat Ind Sa DEVICE FOR BRAKING IN TRANSLATION OF A PROJECTILE ON A TRAJECTORY
US6345785B1 (en) 2000-01-28 2002-02-12 The United States Of America As Represented By The Secretary Of The Army Drag-brake deployment method and apparatus for range error correction of spinning, gun-launched artillery projectiles
GB2365952A (en) 2000-08-16 2002-02-27 Secr Defence Drag brake for a munition

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5379968A (en) * 1993-12-29 1995-01-10 Raytheon Company Modular aerodynamic gyrodynamic intelligent controlled projectile and method of operating same
US5826821A (en) * 1997-08-04 1998-10-27 The United States Of America As Represented By The Secretary Of The Army Drag control module for range correction of a spin stabil
US6310335B1 (en) * 1998-11-30 2001-10-30 Giat Industries Translational braking device for a projectile during its trajectory

Also Published As

Publication number Publication date
EP1366339B1 (en) 2009-07-29
WO2002061363A2 (en) 2002-08-08
US20030037665A1 (en) 2003-02-27
DE60233113D1 (en) 2009-09-10
US6502786B2 (en) 2003-01-07
AU2002245348A1 (en) 2002-08-12
ATE438074T1 (en) 2009-08-15
EP1366339A2 (en) 2003-12-03
EP1366339A4 (en) 2006-07-19
US20020117580A1 (en) 2002-08-29
US6666402B2 (en) 2003-12-23

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